package com.yi.gostockgo.controller.webSocket;

import com.alibaba.fastjson.JSON;
import com.yi.gostockgo.service.httpApi.OkHttpService;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;

import javax.websocket.*;
import javax.websocket.server.PathParam;
import javax.websocket.server.ServerEndpoint;
import java.io.IOException;
import java.util.Timer;
import java.util.TimerTask;
import java.util.concurrent.ConcurrentHashMap;

/**
 * WebSockt服务器
 * ${type} 10 表示大盘指数   20 表示行情数据(涨幅排行)
 * @author liandyao
 */
@ServerEndpoint("/socket/{type}/{userId}")
@Component
public class WebSocketServer {


    static Logger log= LoggerFactory.getLogger(WebSocketServer.class);
    /**静态变量，用来记录当前在线连接数。应该把它设计成线程安全的。*/
    private static int onlineCount = 0;
    /**concurrent包的线程安全Set，用来存放每个客户端对应的MyWebSocket对象。*/
    private static ConcurrentHashMap<String,WebSocketServer> webSocketMap = new ConcurrentHashMap<>();
    /**与某个客户端的连接会话，需要通过它来给客户端发送数据*/
    private Session session;
    /**接收userId*/
    private String userId="";

    /**
     * type
     */
    private String type ;

    /**
     * 连接建立成功调用的方法*/
    @OnOpen
    public void onOpen(Session session,@PathParam("userId") String userId,@PathParam("type") String type) {
        this.session = session;
        this.userId=userId;
        this.type = type ;
        if(webSocketMap.containsKey(userId)){
            webSocketMap.remove(userId);
            webSocketMap.put(userId,this);
            //加入set中
        }else{
            webSocketMap.put(userId,this);
            //加入set中
            addOnlineCount();
            //在线数加1
        }

        log.info("用户连接:"+userId+",当前在线人数为:" + getOnlineCount());

        try {
            sendMessage();
        } catch (IOException e) {
            log.error("用户:"+userId+",网络异常!!!!!!");
        }
    }

    /**
     * 连接关闭调用的方法
     */
    @OnClose
    public void onClose() {
        if(webSocketMap.containsKey(userId)){
            webSocketMap.remove(userId);
            //从set中删除
            subOnlineCount();
        }
        log.info("用户退出:"+userId+",当前在线人数为:" + getOnlineCount());
    }

    /**
     * 收到客户端消息后调用的方法
     *
     * @param message 客户端发送过来的消息*/
    @OnMessage
    public void onMessage(String message, Session session) {
        log.info("用户消息:"+userId+",报文:"+message);

    }

    /**
     *
     * @param session
     * @param error
     */
    @OnError
    public void onError(Session session, Throwable error) {
        log.error("用户错误:"+this.userId+",原因:"+error.getMessage());
        error.printStackTrace();
    }
    /**
     * 实现服务器主动推送
     */
    public void sendMessage() throws IOException {

        //定时向前台发送信息
        Timer timer = new Timer();
        timer.schedule(new TimerTask() {
            @Override
            public void run() {

                //发送给客户端的消息
                String message = null ;
                if("10".equals(type)){//大盘数据
                    message = JSON.toJSONString(OkHttpService.findStockType()) ;
                }else if("20".equals(type)){//排行数据
                    message = JSON.toJSONString(OkHttpService.findStockUp()) ;
                }

                if(session.isOpen())
                    session.getAsyncRemote().sendText(message);
            }
        },1000,OkHttpService.second);

    }




    public static synchronized int getOnlineCount() {
        return onlineCount;
    }

    public static synchronized void addOnlineCount() {
        WebSocketServer.onlineCount++;
    }

    public static synchronized void subOnlineCount() {
        WebSocketServer.onlineCount--;
    }
}
